<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <!--Link标签专门用来引进css代码-->
    <link rel="stylesheet" type="text/css" href="1.css">

</head>
<body>
        <div>div 标签 1</div>
        <div>div 标签 2</div>
        <span>span 标签 1</span>
        <span>span 标签 2</span>

</body>
</html>